描述 Description

The 8V97051 is a high-performance Wideband RF Synthesizer / PLL

optimized for use as the local oscillator (LO) in Multi-Carrier,

Multi-mode FDD, and TDD Base Station radio card. It is offered in a

compact 5 ? 5, 32-VFQFN package.

The 8V97051 Wideband RF Synthesizer / PLL offers a default

Fractional Mode with the option to use it with an Integer mode. It

requires an external loop filter.

The 8V97051 has an integrated Voltage Controlled Oscillator (VCO)

that supports output frequencies from 34.375MHz to 4400MHz, and

maintains superior phase noise and spurious performance.

RF_OUT[A:B] output drivers have independently programmable

output power ranging from –4dBm to +7dBm. The RF_OUT outputs

can be muted. The mute function is accessible via a SPI command

or mute pin.

The operation of the 8V97051 is controlled by writing to registers

through a three-wire SPI interface. The device also has an additional

option that allows users to read back values from registers by

configuring the MUX_OUT pin as a SDO for the SPI interface. The

SPI interface is compatible with 1.8V logic and tolerant to 3.3V.

In multi-service base stations, very low noise oscillators are required

to generate a large variety of frequencies to the mixers while

maintaining excellent phase noise performance and low power. The

8V97051 offers a large tuning range capable of providing multi-band

local oscillator (LO) frequency synthesis in multi-mode base stations,

thus limiting the use of multiple narrow band RF Synthesizers and

reducing the BOM complexity and cost. The device can operate over

-40°C to +85°C industrial temperature range.

特性 Features

? Dual Differential Outputs

? Output frequency range: 34.375MHz to 4400MHz (continuous

range)

? RF Output Divide by 1, 2, 4, 8, 16, 32, 64

? Open Drain Outputs (see Output Distribution Section)

? Fractional-N synthesizer (also supports Integer-N mode)

? 16-bit integer and 12-bit fractional

(16-bit fractional when using the extended registers)

? 3- or 4-wire SPI interface (compatible with 3.3V and 1.8V)

? Single 3.3V supply

? Logic compatibility: 1.8V

? Programmable output power level: -4dBm to +5dBm

(up to +7 when using the extended registers)

? Mute Function

? Ultra low PN for 1.1GHz LO: -143dBc/Hz at 1MHz Offset, (typical)

? Lock Detect Indicators

? Input Reference frequency: 5MHz to 310MHz

? Power Consumption: 380mW (typical) (RF_OUTB disabled)

? 32-Lead, 5 × 5 VFQFN package

? Automatic VCO band selection (Autocal feature)

? -40°C to +85°C ambient operating temperature

? Supports case temperature ? 105°C operations

? Lead-free (RoHS 6) packaging